1 package DBIx::Class::Version::Table;
2 use base 'DBIx::Class';
6 __PACKAGE__->load_components(qw/ Core/);
7 __PACKAGE__->table('SchemaVersions');
9 __PACKAGE__->add_columns
11 'data_type' => 'VARCHAR',
12 'is_auto_increment' => 0,
13 'default_value' => undef,
14 'is_foreign_key' => 0,
20 'data_type' => 'VARCHAR',
21 'is_auto_increment' => 0,
22 'default_value' => undef,
23 'is_foreign_key' => 0,
24 'name' => 'Installed',
29 __PACKAGE__->set_primary_key('Version');
31 package DBIx::Class::Version;
32 use base 'DBIx::Class::Schema';
36 __PACKAGE__->register_class('Table', 'DBIx::Class::Version::Table');
39 # ---------------------------------------------------------------------------
40 package DBIx::Class::Schema::Versioned;
44 use base 'DBIx::Class';
47 # use DBIx::Class::Version;
49 __PACKAGE__->mk_classdata('_filedata');
50 __PACKAGE__->mk_classdata('upgrade_directory');
55 # print "on_connect\n";
56 my $vschema = DBIx::Class::Version->connect(@{$self->storage->connect_info()});
57 my $vtable = $vschema->resultset('Table');
59 if(!$self->exists($vtable))
61 # print "deploying.. \n";
62 $vschema->storage->debug(1);
63 $vschema->storage->ensure_connected();
64 # print "Debugging is: ", $vschema->storage->debug, "\n";
70 my $psearch = $vtable->search(undef,
72 { 'max' => 'Installed' },
76 $pversion = $vtable->search({ Installed => $psearch->get_column('maxinstall'),
78 $pversion = $pversion->Version if($pversion);
80 # warn("Previous version: $pversion\n");
81 if($pversion eq $self->VERSION)
83 warn "This version is already installed\n";
88 $vtable->create({ Version => $self->VERSION,
89 Installed => strftime("%Y-%m-%d %H:%M:%S", gmtime())
94 warn "No previous version found, skipping upgrade\n";
98 # $self->create_upgrades($self->upgrade_directoy, $pversion, $self->VERSION);
100 my $file = $self->ddl_filename($self->upgrade_directory,
101 $self->storage->sqlt_type,
106 # No upgrade path between these two versions
110 $file =~ s/@{[ $self->VERSION ]}/"${pversion}-" . $self->VERSION/e;
113 warn "Upgrade not possible, no upgrade file found ($file)\n";
116 # print "Found Upgrade file: $file\n";
118 open $fh, "<$file" or warn("Can't open upgrade file, $file ($!)");
119 my @data = split(/;\n/, join('', <$fh>));
121 @data = grep { $_ && $_ !~ /^-- / } @data;
122 @data = grep { $_ !~ /^(BEGIN TRANACTION|COMMIT)/m } @data;
123 # print "Commands: ", join("\n", @data), "\n";
124 $self->_filedata(\@data);
127 $self->upgrade($pversion, $self->VERSION);
133 my ($self, $rs) = @_;
136 $rs->search({ 1, 0 })->count;
146 ## Make each ::DBI::Foo do this
147 $self->storage->backup();
154 ## overridable sub, per default just run all the commands.
156 $self->run_upgrade(qr/create/i);
157 $self->run_upgrade(qr/alter table .*? add/i);
158 $self->run_upgrade(qr/alter table .*? (?!drop)/i);
159 $self->run_upgrade(qr/alter table .*? drop/i);
160 $self->run_upgrade(qr/drop/i);
161 $self->run_upgrade(qr//i);
167 my ($self, $stm) = @_;
168 # print "Reg: $stm\n";
169 my @statements = grep { $_ =~ $stm } @{$self->_filedata};
170 # print "Statements: ", join("\n", @statements), "\n";
171 $self->_filedata([ grep { $_ !~ /$stm/i } @{$self->_filedata} ]);
175 $self->storage->debugfh->print("$_\n") if $self->storage->debug;
176 # print "Running \n>>$_<<\n";
177 $self->storage->dbh->do($_) or warn "SQL was:\n $_";
185 DBIx::Class::Versioning - DBIx::Class::Schema plugin for Schema upgrades
189 package Library::Schema;
190 use base qw/DBIx::Class::Schema/;
191 # load Library::Schema::CD, Library::Schema::Book, Library::Schema::DVD
192 __PACKAGE__->load_classes(qw/CD Book DVD/);
194 __PACKAGE__->load_components(qw/+DBIx::Class::Schema::Versioned/);
195 __PACKAGE__->upgrade_directory('/path/to/upgrades/');
200 # my special backup process
207 ## overridable sub, per default just runs all the commands.
209 $self->run_upgrade(qr/create/i);
210 $self->run_upgrade(qr/alter table .*? add/i);
211 $self->run_upgrade(qr/alter table .*? (?!drop)/i);
212 $self->run_upgrade(qr/alter table .*? drop/i);
213 $self->run_upgrade(qr/drop/i);
214 $self->run_upgrade(qr//i);
219 This module is a component designed to extend L<DBIx::Class::Schema>
220 classes, to enable them to upgrade to newer schema layouts. To use this
221 module, you need to have called C<create_ddl_dir> on your Schema to
222 create your upgrade files to include with your delivery.
224 A table called I<SchemaVersions> is created and maintained by the
225 module. This contains two fields, 'Version' and 'Installed', which
226 contain each VERSION of your Schema, and the date+time it was installed.
228 If you would like to influence which levels of version change need
229 upgrades in your Schema, you can override the method C<ddl_filename>
230 in L<DBIx::Class::Schema>. Return a false value if there is no upgrade
231 path between the two versions supplied. By default, every change in
232 your VERSION is regarded as needing an upgrade.
234 NB: At the moment, SQLite upgrading is rather spotty, as SQL::Translator::Diff
235 returns SQL statements that SQLite does not support.
242 This is an overwritable method which is called just before the upgrade, to
243 allow you to make a backup of the database. Per default this method attempts
244 to call C<< $self->storage->backup >>, to run the standard backup on each
247 This method should return the name of the backup file, if appropriate.
251 This is an overwritable method used to run your upgrade. The freeform method
252 allows you to run your upgrade any way you please, you can call C<run_upgrade>
253 any number of times to run the actual SQL commands, and in between you can
254 sandwich your data upgrading. For example, first run all the B<CREATE>
255 commands, then migrate your data from old to new tables/formats, then
256 issue the DROP commands when you are finished.
260 $self->run_upgrade(qr/create/i);
262 Runs a set of SQL statements matching a passed in regular expression. The
263 idea is that this method can be called any number of times from your
264 C<upgrade> method, running whichever commands you specify via the
265 regex in the parameter.
269 Jess Robinson <castaway@desert-island.demon.co.uk>